Electromagnetic Design of Multi-Disc Coreless Axial Magnetic Flux Permanent Magnet Motor

In this paper, a multi-disc coreless axial magnetic flux permanent magnet (AFPM) motor is presented. This motor takes the advantage of single-phase winding and H-bridge drive topology, which improve the fault-tolerant performance of the motor and greatly simplify the winding process. According to the performance requirement of the motor, the size, permanent magnet (PM) structure, yoke structure and the winding are designed. The model of the motor is built by the three-dimensional finite element analysis (FEA) method. The air gap magnetic flux density, back EMF and the torque of the motor are investigated. Also, the stress of the motor is studied to verify the reliability of the motor.